Sunna denotes the practice of Islamic prophetMuhammad that he taught and practically instituted as a teacher of the sharī‘ah and the best exemplar.[6] The sources of sunna are usually oral traditions found in collections of Hadith and Sīra (prophetic biography). Unlike the Qur'an, Muslims do not agree on the same set of texts or sources of Sunnah, and they emphasize different collections of hadith based on to which Islamic school or branch they belong.